A055161
n has digits in descending order and n=a+b where a has the digits of n in another order and b has the digits of n in ascending order (perhaps with leading zeros).
Original entry on oeis.org
954, 7641, 995544, 766431, 76664331, 98754210, 987654321, 999555444, 7666643331, 9876543210, 9987542100, 98766543321, 766666433331, 987665433210, 998765432100, 999875421000, 999955554444, 9876665433321
Offset: 0
- Denis Borris, Ken Duisenberg's Puzzle of the Week, April 20, 2000
A055157
n has distinct digits and n=a-b where a has the digits of n in descending order and b has the digits of n in ascending order (perhaps with leading zeros).
Original entry on oeis.org
495, 6174, 97508421, 864197532, 9753086421
Offset: 0
A055159
n has distinct digits in ascending order and n=a-b where a has the digits of n in descending order and b has the digits of n in another order (a and b perhaps with extra zeros).
Original entry on oeis.org
459, 1467, 1245789, 123456789, 123456789
Offset: 0
- Denis Borris, Ken Duisenberg's Puzzle of the Week, April 20, 2000
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